Teledyne LeCroy ZS2500 - Manual (Page 30)

ZS Series High-Impedance, Active Probes
20. Remove the banana plug adapter from the DMM and connect the precision
50 Ω terminator to the DMM, making sure that the banana plug side marked
"GROUND" is connected to the LOW or COMMON input of the DMM.
21. After the DMM has stabilized, record the reading to 100 μV resolution as
"Measured Output Voltage, mid range" in the Test record.
22. Calculate the error by dividing the measured mid range output voltage
recorded in step B-21 by the expected mid range output voltage recorded in
step B-19. Subtract 1 from this ratio and multiply by 100% to get the error in
percent.
23. Record the calculated error to two decimal places (±0.xx %) as "Gain Error,
mid range" in the Test record.
24. Verify that the mid range gain error is less than ±1.0%
This completes the Performance Verification of the ZS1000, ZS1500, or ZS2500.
Complete and file the Test Record, as required to support your internal
calibration procedure.
Apply suitable calibration label to the ZS1000, ZS1500, or ZS2500 housing as
required.
NOTE: The function generator used in this Performance Verification Procedure is
used for making relative measurements. The output of the generator is
measured with a DMM or oscilloscope in this procedure. Thus, the generator is
not required to be calibrated.
Performance Verification Test Record
The next page can be used to record the results of measurements made during
the performance verification of the ZS Series Probes. Permission is granted to
photocopy it and record the results on the copy. File the completed record as
required by applicable internal quality procedures. The section in the test record
corresponds to the parameters tested in the performance verification
procedure. The numbers preceding the individual data records correspond to
the steps in the procedure requiring the recording of data.
Results to be recorded in the column labeled Test Result are the actual
specification limit check. The test limits are included in all of these steps. Other
measurements and the results of intermediate calculations that support the limit
check are to be recorded in the column labeled Intermediate Results.
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